The BNB Chain’s core development team has officially unveiled the public mainnet debut of opBNB layer-2 network designed to increase the scalability of decentralized applications within the BNB chain ecosystem.
This significant milestone follows an extensive testing phase conducted by the tea, to guarantee the network’s dependability
What is opBNB layer-2?
opBNB is a high-performance layer-2 solution within the BNB system built using the OP stack.
Leveraging its block size of 100M, opBNB layer-2 fees remain stable and low cost, making it an excellent solution for widespread adoption across multiple digital environments. From gaming and decentralized exchanges to daily use and digital collectibles, opBNB caters to a diverse set of needs while delivering optimal performance
Contribute Back to Open Source Community
OpBNB utilizes the robust and adaptable OPStack framework, which allows for quicker and simpler deployment of scalable Layer 2 infrastructure. These major optimizations applied to the opBNB are advantageous not only for the BNB Chain community but also for the broader Layer 2 open-source ecosystem. Here are some examples that have already been submitted to the OP Stack.
- Eliminate the addSafeAttributes Function
- Eliminate LastL2Time function
- Abort Failed Payload Confirmation opBNB codebase is fully open source and all the optimizations in opBNB can be reused in other optimistic rollup implementations as well.
We hope that this work will inspire more collaboration and innovation among EVM-compatible blockchain developers and users.
opBNB layer-2: A New Era of Scalability
In 2022, Layer 2 (L2) solutions began to gain traction, as developers and users began to recognize scalability as a real problem for monolithic blockchains, which at that point, were most of the leading Layer 1 chains. Rollups built on Ethereum such as Arbitrum and Optimism gained significant attention, quickly rising to become popular ecosystems in the DeFi space. BNB Chain made an announcement in June 2023 to introduce their very own L2 solution, opBNB, in a move to further scale BSC.
OpBNB is designed based on the Optimism OP Stack, an open-source codebase, with modifications to meet the needs of BSC. OpBNB adopts the Optimistic rollup architecture, abstracting the execution layer into its own layer, while the remaining blockchain functions are handled by the L1, in this case, the BNB Smart Chain.
The opBNB layer processes transactions off-chain and posts transaction data back onto the L1 as calldata, enabling higher transaction speed and lowered gas fees for users on the L2. Just like other rollups, opBNB uses the gas token of the L1 chain, which is the BNB token that makes opBNB layer-2 fees lower than other layer2
Building on the OP Stack, opBNB introduces optimizations in data caching, block mining, and the derivation layer to meet their needs. OpBNB optimizes the way data is cached on the chain by adding an additional layer in the cache (L1.5: “SharedPool”). This increases the cache hit rate, which reduces the need to query the database directly, hence, increasing the efficiency of retrieving data on opBNB.
Why choose OP Stack as the foundation of opBNB layer-2?
The opBNB network represents a Layer 2 scaling solution strategically constructed atop the Binance Smart Chain (BSC), leveraging the innovative OP Stack framework.
OP Stack, rooted in the principles of utility, simplicity, and extensibility, serves as a robust foundation for opBNB layer-2, offering numerous advantages, including:
- Modularized Frameworks: opBNB gains the ability to tailor various modules to its specific needs. This flexibility encompasses the customization of an execution client to enhance performance, the implementation of data scalability enhancements through different data accessibility layers, the adoption of diverse proof generation methods (including zk proofs), and more.
- Open Ecosystem: OP Stack fosters an open and collaborative ecosystem that encourages diverse projects to collaborate and mutually benefit. Through its association with OP Stack, opBNB becomes part of a network of Layer 2 chains that share the same technological stack and can seamlessly interoperate with one another.
- Contributing to OP Stack’s Advancements: The BNB Chain Community wholeheartedly embraces the efforts and innovations introduced by Optimism to the OP Stack framework. Optimizations and innovations implemented by opBNB are poised to enrich the broader ecosystem and will be contributed back to the OP Stack. This commitment serves to propel the development of optimistic rollup technology for the entire industry.
By embracing OP Stack as its cornerstone, opBNB not only enhances its own scalability but also strengthens the broader ecosystem while contributing to the collective progress of Layer 2 solutions.
Why does BSC need a new L2?
Network congestion can give rise to elevated transaction fees, sluggish transaction processing, and a suboptimal user experience.
Layer 1 networks serve as the foundational infrastructure for data transmission and validation, exemplified by platforms like Binance Smart Chain (BSC) and Ethereum. These networks commonly grapple with the issue of network congestion during peak usage periods, typically occurring when popular applications run promotional campaigns or experience a surge in user traffic.
To effectively address these challenges, Layer 1 networks must enhance their scalability, which is the capacity to handle a greater volume of transactions per second without compromising security.
As an illustrative example, in 2021, Binance Smart Chain (BSC) hosted a web3 game that generated an impressive daily transaction volume exceeding 8 million transactions. This underscores the pressing need for Layer 1 networks to bolster their scalability capabilities, ensuring they can accommodate the burgeoning demand for blockchain-based applications and services while maintaining a smooth and cost-effective UX.
- BSC’s throughput capacity would presumably be vastly exceeded, resulting in slowed transaction speeds, delayed transaction finality, and a poor user experience both for game players and users of other Dapps.
- Daily gas fees could potentially rise to over 6,800 BNB ($3M USD) at that level of usage, posing a substantial barrier to the usability and sustainability of this game. The immense transaction loads from a dApp on such a large scale seem infeasible for BSC to handle efficiently in its current form.
Significant optimizations and scaling solutions would likely be required for BSC to support such a dApp without network-wide performance degradation and unreasonably high costs.
Benefits of opBNB layer-2 for Developers and Users
The introduction of the opBNB chain brings a substantial increase in transaction throughput to the BNB Chain ecosystem while preserving its essential EVM compatibility, a cornerstone of its initial success. Furthermore, opBNB seamlessly integrates with the existing Binance Smart Chain (BSC), enabling the utilization of ecosystem assets like BNB directly within the opBNB layer-2 environment.
Moreover, through its association with the OP Stack, enhancements made to the codebase have a direct positive impact on opBNB’s development trajectory. In a reciprocal fashion, advancements achieved by opBNB can also directly contribute to the evolution of the OP Stack codebase. Notably, the opBNB team has already made noteworthy contributions to the OP Stack codebase, including the removal of redundant functions and the addition of the “Abort Failed Payload Confirmation” feature.
However, the current status of opBNB’s inclusion within Optimism’s Superchain ecosystem remains uncertain.
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